Nghiên cứu, thiết kế và chế tạo máy uốn, cắt bằng cơ sở tính toán, mô phỏng và thực nghiệm

NGHIEN CUrU-TRAOD(!)l V NGHIEN CIJU, THltT K^ VA CHt TAO MAY U N , C A T BANG ca sCy TINH TOAN, MO PH6NG VA THl/C NGHIEM BENDING AND CUTTING MACHINE DESIGN BY SIMULATION METHOD AND EXPERIMENT ThS Le Phircmg Long, KS Trao Dux Dien, KS Hoang Vdn TVyc Trucmg Dai hgc Lac Hdng Muc dich cua viec nghien euu ndy sir dung phdn mim Solidworks de thiit ke kit cdu ca mdy uon, cdt vgt lieu Phdn mem DEFORM dung diphdn tich qud trinh uon vd cdt tgo biin dgng daithepClS C25, C35, C45 Kit qud md phong dudoan qud trinh udn va cat cua vgt lieu, lucuon, luc cdt, dudng kinh phoi, vdt lieu ldm dai dugc dua thdo ludn Tir kit qud thifC nghiem cho thdy mdy uon, cdt dugc vgt lieu nhom, dong, thep, vai duang kinh tir 6 - tp8 mm vdi nhieu kich thudc dai khdc tir hinh vuong vd hinh chit nhdt Tfr khoa: May uon, cdt thuy luc ABSTRACT The purpose of this study uses Solidworks software to design frame of bending machine, the Deform software simulates behavior of Steel in forming process The result of simulation investigates forming process of material, diameter which given out to discussion The result of experiment bending and cutting CIS, C25, C35, C45 steel, allunium, copper with diameter (j)6 - ^8 mm Keywords: Bending and cutting machine D^T VAN DE 11] Hien nay, mgt sd nghien ciiu khac da phdn tich anh huong den qua trinh udn cdt thdng qua qua trinh md phdng va ket qua thuc nghiem; tuj^ nhien, vdn cdn han chS viec tim kidm yeu td dnh hudng den qua trinh md phdn^ nhu: Gdc udn, he sd ma sat, chia ludi phdn tir, iing suat Stress, Straim de lam nen tang thiet ke, tdi uu hoa ket cau ciia mdy, cdu tnic khudn udn va dao cdt Chinh vi le do, nhdm dd nghien ciiu chgn phdn mem DEFORM - 3D d8 md phdng qud trinh biin dan§ ciia vdt lieu cho cdc phuangphdp dot, udn, cdt va dap ngudi ben ben canh dd la phan mem thiSt ke Solidworks de thiet ke ket can co may ISSN 0866-7056 TAP CHi CO KHi VlfiT NAM, S6 12 nam 2015 www.cokhivietnam.vii NGHIEN COfU-TRAODOI Qua trinh md phdng phdn tich la ca sd de nhdn biet dugc cac yeu td anh hudng dSn qua trinh udn, cat dot nhu ma sat, iing suat keo, ling sudt nen, luc udn, luc cat dugc dua thdo ludn Ket qua thuc nghiem la ca sd danh §ia kha nang hoat ddng tdi uu viec lira chgn thiet hi va kha nang dap iing thi§t kk Qua trinh md phdng tao bien dang udn va cat se dugc thiet lap Ket qua md phdng se du doan dugc bien dang ciia qua trinh uon tao iing sudt Stress, Strain va luc cdt de ldm co sd va nen tang cho viec thiet ke va che tao may udn va cat vat lieu Dinh nghTa timh hgc X C O s d LY THUYET 12], 13] Chia luoi (Mesh) + Luc cat theo ly thuyet: _i_ Phan tich md phdng Trong do: I Vat lieu, dieu kien ban kj = 0,7 ddi vdi thep m£m k, = 0,6 ddi vdi thep ciing F: Dien tich tiet dien dugc cat + Luc uon theo ly thuyet: M" m a x X Kgtqua Hmh Quy trinh mo phdng [ ] 3.1 Thong so md phong Trong dd: ft, = -'"ã!ô = - = 0,6-5-0,7 M" max : Md men udn lan nhat, N/mm; W m a x : Md men chdng udn ldn nhat, mm' [cr^^ ] : Gicd ban chay cho phep, N/mm^ Qua trinh thuc hifn md phong [4] (^ua trinh thuc hi§n md phdng bao gdm khudn udn va khuon cdt Sau thuc hien chia ludi cdc phdn tii, thiet lap vdt lieu va dat dieu ki6n bien cho khudn udn, khudn cat va phdi Sir dung vdt lieu md phdng la thep C15, C25, C35, C45, kich thuac md phong vdi chieu dai 20x20 mm, 25x25 mm, 30x30 mm, ddi vai bien dang hinh chft nhdt 15x25, 20x35 mm vdi dudng kinh phdi ^6 vd (t)8 mm U"ng sudt tdi han vd CO tinh ciia vdt lieu dugc the hien thu vien vat lieu md phong phan mem DEFORM V6.0 Trong bai bao nay, qua trinh md phdng nham du doan ket qud dua tren su thay ddi cac gia tri vd he sd ma sdt, chia ludi phdn tu, dudng kinh va vdt lieu dugc the hien d bang Bdng 1: Thdng sd md phdng qud trinh cdt tao Id: Vat lieu Dirarngkinh Stt (mm) Bien dang Ma sat Thep Vuong Chir nhat 15x25 l|>6 i|i8 0.8; 0.12 C15 20x20 l|>6 (|i8 0.8; 0.12 C25 25x25 15x25 ^6 i|i8 0.8; 0.12 C35 30x30 15x25 (|>6 (|>8 0.8; 0.12 C45 35x35 15x25 ISSN 0866 - 7056 TAP CHi CO KHi VIET NAM, S6 12 nam 2015 www.cokhivietnam.vn NGHIEN C U T U - T R A O D O I KET QUA MO PHONG 4.1 Ket qua mo phdng chia IircH phan tv Mo phdng vdi cdc thdng sd chia ludi phdn tu khac nhau, lugng chia ludi cdc phan tit cang ldn thi thdi gian md phdng cang Idu, K^t qud md phdng vdi lugng mesh 10.000 phdn tir d6n 50.000 phdn hi thi b6 mat chia ludi khd hi phd vd han Ket qud phan tich cho thdy vai lugng chia phdn tu la 30.000 phdn tii thi chuang trinh chay dn dinh hem va cho kSt qud be mat uon va cat tdt han khudn udn tren chEim vao hh mat phdi Upg sudt chi xudt hien chay tren cham vao be m^t phdi, ling sudt tai vi tri udn ndy tang dan nhung khdng gay pha huy tao bidn dang udn nhu hinh 10 Khi khudn tren di chuyln len 200inm va phdi tidp tuc dua de thuc hidn uon luc udn th^ hien 7000N Hinh cho thdy luc udn 7500N tai vi tri udn 90" lugng bien dang tap trung ldn nhat Hinh 3,4,5 cho thdy luc udn khdng thay ddi ldn va lugng bidn dgng tap trung tai cac vi tri udn Lugng bidn dang khdng gdy phd hiiy vat lieu vdi gdc udn 90" vd 45" tao bien dang udn 90° 4.2.2 Qud trinh cat 4.2 Kit qua m6 phong biin dang cua vat lieu qua trinh u6n va cdt Khi khudn tren chua tac ddng len be mat phdi thi ling sudt chua sudt hien va chi xuat hien khudn cdt tr6n cham vao be mdt phdi, 4.2.1 Qud trinh uon [5] ling xudt cii tdng vugt qua gidi ban dd ben cua Khi khudn tren chua tac dgng len be mat vdt lieu nd se pha va cau tnic lien ket cac phdn phdi thi ling suat chua suat hien va chi xudt hien tu tgo nen vet cat tai vi tri tiep xiic the hien tai: Hinh Ung sudt udn ldn Hinh Ifng sudt udn ldn ISSN 0866 - 7056 TAP CHi CO KHi VlfiT NAM, S6 12 nam 2015 www.cokhivietnam.vn NGHIEN CUTu - TRAO Ddi I*; ilalii Hinh 8: ifng sudt bdt ddu cdt Hinh 9: Phoi thep da duac cdt Hinh anh tren cho thiy, sau l4n u6n phoi thep hinh 2,3,4,5,6, thi phoi dugc cjt a hinh 8,9 cho thay mau siic da thay doi qua timg vi tri u6n va cat, vi tri ma mau dam chinh la noi co ling suit cao nhat 4.3 Ket qua mo phong lyc u6n v^ c^t Kk qua mo phong lite u6n cit voi vat li$u thep vdi duong kinh 06, 08, 010, 012 Bdng 2: Thong so md phdng luc udn vd cat vdt lieu thep vd tra bdng chon Xilanh L n c HOD S6 TT DlTOTDg kfnh H e so sat 06 O.S 0S 0.8 010 O.S 012 O.S Vit Li|u C15 C25 C35 C45 C15 C25 C35 C45 C15 025 C35 C45 CIS C25 C35 C45 LHcfN) *20% he so an L^cit Lv«(N) lila nh *20% B / K loDg (Dmm) D/Kcan (doim) 22-28 28-36 22-28 28-36 28-36 36-45 36-45 36-45 36-45 45-56 36-45 36-45 45-56 56-70 45-56 56-70 3230 6550 4S90 3876 7860 5868 10400 15600 11400 12480 18720 13680 40 50 40 4680 6600 12100 8720 85SO 11400 24500 22500 19700 22600 42300 40800 3S800 5616 7920 14520 10464 10296 13680 29400 27000 23640 27120 50760 48960 46560 11800 16400 25600 17800 18200 24300 40500 25400 25500 39600 61500 40100 43200 14160 19680 30720 21360 21840 29160 48600 30480 30600 47520 73800 48120 51840 50 50 63 63 63 63 SO 63 63 80 100 80 100 ISSN 0866 - 7056 TAP CHi CO KHI VIET NAM, Sd 12 nam 2015 www.coldiivietnam.vn NGHIEN CUfU-TRAO OOl 4.4 Bieu luc uon va cat Bdng 3: Thong so luc uon vgt lieu thep vd chgn Xilanh uon JS